Door lock



March 23, 1954 G. MARCHE-rn 2,672,745

DooR Loox Filed July l5, 1950 1N VEN TOR. GIOVANNI MARC/157' 7'/ wwwPatented Mar. 2?, 1954 vUri-irse STATES PATENT' oFFice 2,672,745 i DO0RLOCK Giovanni Marchetti, San Diego, Calif. Application July 15, 1950,Serial No. 174,073 3` Claims: (Cl. 70-101) Myjinvention'relates to adoor lock, andinorc with the door jamb surface IIb of the door 'jambvi'iartcularly to a door loci:I in the jamb of a door, I' I. The faceplate I c is provided with a central actuated by the sliding'bolt ci` aconventional opening Ib and secondary openings Ic .and Id, atlockinf'the door,` and the objects of my invenopposite sides thereof invvertically spaced relation'are: 5 onship with said opening Ib Theconventional First, to pro provides for additional shear strength in adoor ings 9a, gb and 9c, respectively. lockr by providing auxiliarybolts which are dis- It 'will be noted that the door Ill is hingedrelaposed atopposite sides of the conventional lock tive to the jamb II, and that the conventional bolt, in vertically spaced relationshiptherewith;l lo lock bolt il is mounted in a conventional casing Second,to providea lock of this class which may 5a set into the door I Il.

be'used in cooperative relation with various con- In the casing I arebolts 2 and 3, which are ventional locks now inA use with very slightreciprocally mounted in the openings Ic and Id, changes intheconventional lock face plate; respectively, and which are provided withgear Third,j to provide a lock of this class which oprit; rack portions2a and 3a, engaging the large dierates very-easily and positively;ameter gear portions 4a and 5a of the gears 4 Fourth; to provide a lockof this class which and t, respectively. The small diameter gearisveryeasy to install; portions Ib and 5b engage opposed gear rack por-F'ifth, tov provide a lock of this classl which tions @a and 5b,respectively, ofthe gear rack greatly strengthens the locking structureof al gi) membert, which isslidably mounted at fits outer angularstability of doois, which prevents twist- Adiaoent the opening Ib isprovided a hollow ing of the same when pi essure is exerted thereon;guide Ic, which supports the outer end 6c of the Sixth, to provide alock of this class which ingear rack member 6 during its reciprocalmovecorporates three locking bolts, which are all actu- 3 ment, asindicated by dash lines in Fisr l of the ated by a` single key; anddrawings.

Seventh, to provide a lock of this class which Theoperationofimy doorlockis substantially is.v very simple and economical of construction,asfollows: ellicient in operation, and which will not readily When thedoor IIJ is closed relative to the jainb deteriorate or get out oforder. II, and a key is inserted in the casing ila of the With these andother objects in view, as will d conventional lock the key is turnedcausing exappeai hereinafter, my invention consists of cer tension ofthe conventional lock bolt 8 to the dash characters of referencethereon, forming a part to cause rotation of the gear portions la and5a, of this application, in which: which engage the gear racks 2a and 3ato cause Fig. l is a vertical sectional view of my lock, l the bolts 2and 3 to be extended to the dash line shown installed in connection witha door and to positions C and D, in which positions these bolts doorjamb; and Fig. 2 is a plan sectional view, are extending' through theopenings 9b and 9c in taken ii om the line 2-2 of Fig. l. theconventional lock face plate 9 In such ex- Similar characters ofreference iefei to simitended position the bolts 2 and 3 are operativelylai parts and portions throughout the several supplemental to the bolt 8all of which strengthviews of the drawings. ii ens the lockingaiiangement of the door ID It The Casing I, bolts 2 and 3, gears 4 and5, gear will be understood that in most door locks the rack member 5,spring l', conventional lock bolt 8, bolt 8 is restrained againstretraction until reconventional lock face plate 9, door IG, and doorleased by a key. The bolt 8 being thus restrained jamb II, constitutethe principal parts and por holds the rack member in the dotted lineposition tions of my door lock. "10 shown in Figure l, until a key isused to retract In the construction of my door lock, I have the bolt 8.provided a substantially rectangular box-shaped It will he noted thatwhen the conventional casing I, which is adapted to be set into thestruclock bolt 8 is retracted by the key, the spring 1,

ture of the door jamb I I, and this casing I is w connected at its oneend to the gear rack memprovided with face plate Ia, substantially flush@D ber 6 and at its opposite end to the casing by pin if, is forcedbackwardly into the solid line position as shown in Fig. l of thedrawings, which concurrently retracts the bolts 2 and 3 from theopenings 8b and Sic in the conventional lock face plate 9.

that during the rotation of the gears 4 and 5 they are maintained 1nposition in the casing l by means llc and 5c, which are xed to the innerside oi the casing l.

Though I have shown and described a particular construction, combinationand arrangement of parts and portions, I do not wish to be limited tothis particular construction, combination and arrangement, but desire toinclude in the scope of my invention the construction, combination andarrangement substantially as set forth in the appended claims.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

l. A locking mechanism ior locking a member against swinging movementrelative to a second member, comprising opposing loc-k casings navingapertured face plates in opposing relation, the apertures in one iaceplate being opposite to the apertures in the other tace plate, a lockbolt operatively mounted in one casing and extendable from one faceplate through the other face plate, said bolt being of the type which isrestrained against retraction until released by a key, a spring-biasedbolt-operated member operably mounted in the other casing and positionedfor being engaged by said bolt and driven i wardly of said other casingagainst spring pressure when said bolt is extended, a secondary boltoperably mounted in said other casing, and mechanical linking meansconnecting said member and said secondary bolt for extending saidsecondary bolt through both said face plates when said member is driveninwardly.

2. A locking mechanism for locking. a member against swinging movementrelative to a second member, comprising opposing lock casings havingapertured face plates in opposing relation, the apertures in one faceplate being opposite to the apertures in the other face plate, a lockbolt operatively mounted in one casing and extendable from one faceplate through the other face plate,

means of the which is restrained against retraction a key, aspring-biased bolt-operated member operably mounted in the other casingand positioned for being engaged by said bolt and driven inwardly ofsaid other casing against spring pressure when said bolt is extended, asecondary bolt operably mounted in said other casing, and mechanicallinking means connecting said member and said secondary bolt forextending said secondary bolt through both said face plates when saidmember is driven inwardly, said member including a rack and saidmechanical linking means comprising a gear means operated by said rackand operating said secondary bolt.

said bolt being of for locking a member against swinging movementrelative to a second member, comprising opposing lock casings havingapertured face plates in opposing relation, a lock bolt operativelymounted in one casing and extendable from one iace plate through theother face plate, said bolt being of the type which is restrainedagainst retraction until released by a key, a spring-biasedbolt-operated member operably mounted in the other casing and positionedfor being engaged by said bolt and driven inwardly of said other casingagainst spring pressure when said bolt is extended, a secondary boltoperably mounted in said other casing, and mechanical linking meansconnecting said member and said secondary bolt for extending saidsecondary bolt through both said face plates when said member is driveninwardly, said member including a rack and said mechanical linking meanscomprising a gear means operated by said rack and operating saidsecondary bolt, said member `having a second rack in opposing relationto the first mentioned rack, another secondary bolt similar to the firstmentioned secondary bolt, another gear means similar to said gear meansand operated by said second rack, said lock bolt being manually operatedas by a key.

GIOVANNI MARCHETTI.

Name Dalziel et al.

Date June 9, 1936 Number

